Removing the Cummins ISX system's emissions controls commonly called an "ISX delete" is the increasingly widespread modification for commercial trucks, although it’s critical to understand the https://docs.google.com/forms/d/e/1FAIpQLSdspTJGjB4yyIADRybb0YyNWTc_87geTql01KwiqZgtJ2pPpw/viewform?usp=publish-editor